Hi all,
I've notice a strange behaviour signing an existing invisible signature
field. I've noticed that the field was created multiple times every time i
try to sign it.
I think is due to preClose method that is based on a wrong condition that
recreate the field if the field passed is invisible
boolean fieldExists = !(isInvisible() || isNewField());
> PdfIndirectReference refSig = writer.getPdfIndirectReference();
> writer.setSigFlags(3);
> PdfDictionary fieldLock = null;
> if (fieldExists) { //<--- This create the problem
> PdfDictionary widget = af.getFieldItem(name).getWidget(0);
> writer.markUsed(widget);
> fieldLock = widget.getAsDict(PdfName.LOCK);
> widget.put(PdfName.P, writer.getPageReference(getPage()));
> widget.put(PdfName.V, refSig);
> PdfObject obj =
> PdfReader.getPdfObjectRelease(widget.get(PdfName.F));
> int flags = 0;
> if (obj != null && obj.isNumber())
> flags = ((PdfNumber)obj).intValue();
> flags |= PdfAnnotation.FLAGS_LOCKED;
> widget.put(PdfName.F, new PdfNumber(flags));
> PdfDictionary ap = new PdfDictionary();
> ap.put(PdfName.N, getAppearance().getIndirectReference());
> widget.put(PdfName.AP, ap);
> }
> else {
> PdfFormField sigField = PdfFormField.createSignature(writer);
> sigField.setFieldName(name);
> sigField.put(PdfName.V, refSig);
> sigField.setFlags(PdfAnnotation.FLAGS_PRINT |
> PdfAnnotation.FLAGS_LOCKED);
> int pagen = getPage();
> if (!isInvisible())
> sigField.setWidget(getPageRect(), null);
> else
> sigField.setWidget(new Rectangle(0, 0), null);
> sigField.setAppearance(PdfAnnotation.APPEARANCE_NORMAL,
> getAppearance());
> sigField.setPage(pagen);
> writer.addAnnotation(sigField, pagen);
> }
Why not use this below?
> if (!isNewField()) { //condition changed to evicting create a
> new signature field
> PdfDictionary widget = af.getFieldItem(name).getWidget(0);
> writer.markUsed(widget);
> widget.put(PdfName.P, writer.getPageReference(getPage()));
> widget.put(PdfName.V, refSig);
> PdfObject obj =
> PdfReader.getPdfObjectRelease(widget.get(PdfName.F));
> int flags = 0;
> if (obj != null && obj.isNumber())
> flags = ((PdfNumber)obj).intValue();
> flags |= PdfAnnotation.FLAGS_LOCKED;
> widget.put(PdfName.F, new PdfNumber(flags));
> if (!isInvisible()) { //link widget appereance only if is
> visible
> PdfDictionary ap = new PdfDictionary();
> ap.put(PdfName.N, getAppearance().getIndirectReference());
> widget.put(PdfName.AP, ap);
> }
> }
> else {
> PdfFormField sigField = PdfFormField.createSignature(writer);
> sigField.setFieldName(name);
> sigField.put(PdfName.V, refSig);
> sigField.setFlags(PdfAnnotation.FLAGS_PRINT |
> PdfAnnotation.FLAGS_LOCKED);
> int pagen = getPage();
> if (!isInvisible())
> sigField.setWidget(getPageRect(), null);
> else
> sigField.setWidget(new Rectangle(0, 0), null);
> sigField.setAppearance(PdfAnnotation.APPEARANCE_NORMAL,
> getAppearance());
> sigField.setPage(pagen);
> writer.addAnnotation(sigField, pagen);
> }
Thanks in advance
Emanuele
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